Switching Converter for Automotive Power Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium-ion batteries in automotive power systems face charge imbalances due to varying voltage, capacity, and life based on anode and cathode materials, which can affect the overall performance and efficiency of the power system.
Innovation Solution
A power system comprising a plurality of power storage units, a multiplexer, a polarity flipper, and a switch converter that can operate as either a flyback or forward switchmode power converter, allowing for selective connection and control of power flow between units to balance charge and voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a lithium-ion battery uses different anode and cathode materials, then the voltage and capacity can be optimized, but charge imbalances occur among power storage units
Solution Approach 1:
The switching converter dynamically switches between flyback and forward modes based on real-time voltage and charge state comparisons. The control system continuously monitors the voltage across each power storage unit and adjusts the converter mode accordingly, making the system adaptive rather than static to maintain charge balance while accommodating different battery materials with varying voltage and capacity characteristics.
Solution Approach 2:
The system changes operational parameters by switching between two distinct converter modes (flyback and forward). In flyback mode, the converter transfers energy when the first power storage unit voltage is higher than the second. In forward mode, it transfers energy when the first voltage is lower. This parameter switching allows the system to accommodate and balance different battery materials with varying electrical characteristics.
2Reliability
If a switching converter is designed to selectively operate as flyback or forward converter, then charge balance is achieved, but device complexity increases
Solution Approach 1:
The switching converter is designed with multi-functionality, capable of operating in both flyback and forward modes using a unified circuit architecture. This universal design allows a single converter to perform multiple functions (bidirectional energy transfer in different modes) rather than requiring separate dedicated converters for each mode, thereby managing complexity while achieving charge balance.
Solution Approach 2:
The converter employs dynamic switching between operational modes based on real-time system conditions. The control system monitors voltage differentials and automatically selects the appropriate mode (flyback or forward), making the converter adaptive rather than requiring multiple fixed configurations. This dynamic approach consolidates complexity into a single intelligent switching mechanism.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively balances charge imbalances among power storage units, optimizing voltage and capacity distribution, thereby enhancing the performance and longevity of the lithium-ion batteries in automotive applications.
Implementation Method 1
a switch converter electrically connected with the multiplexer... configured to selectively act as a flyback switchmode power converter or a forward switchmode power converter
Data Source
AI summary
A power system for an automotive vehicle includes a plurality of power storage units, a multiplexer electrically connected with the power storage units, and a switching converter electrically connected with the multiplexer. The switching converter is configured to selectively act as a flyback switchmode power converter or a forward switchmode power converter.